A solidus of Constantine.
From classical Latin solidus (“solid”). See solid. In numismatic and weight senses, via medieval Latin solidus (“various coins”), from Late Latin solidus (“a gold coin of the Roman Empire”). In chemical sense, via German Solidus, coined by H.W.B. Roozeboom in his 1899 Zeitschrift für Physikalische Chemie, Stöchiometrie, und Verwandtschaftslehre (XXX, p. 387).
solidus (plural solidi or soliduses)
- (historical) Various medieval and early modern coins or units of account, particularly:
- A Roman ~23k gold coin introduced by Diocletian in AD 301.
- Its successor Byzantine coins, of progressively debased weight and purity.
- (obsolete) Alternative term for sol or sou: a Carolingian unit of account equivalent to a solidus of silver.
- (obsolete) Alternative term for soldo: the silver coins of various Italian states.
- (obsolete) Alternative term for shilling: an English unit of account and, following the Tudor dynasty, silver coin.
- (historical) The weight of the Roman gold coin, 1/60 of a Roman pound under Diocletian or 1/72 lb. (about 4.5 grams) after Constantine.
- (historical) A medieval French weight, 1/20 of the Carolingian pound.
- (typography) Alternative term for slash ⟨/⟩, originally (Britain) in its use as the shilling mark and now its formal designation by the ISO and Unicode.
- (typography) The formal name of the oblique strikethrough overlay (as in A̷ and B̸) in Unicode.
- (typography) The division line between the numerator and the denominator of a fraction, whether horizontal or oblique.
- (chemistry, physics) The line in a phase diagram marking the temperatures and pressures below which a given substance is a stable solid.
- Oxford English Dictionary, "solidus, n.1" and "solidus, n.2"
- solidus in The Century Dictionary, The Century Co., New York, 1911
- solidus at OneLook Dictionary Search
From Proto-Indo-European *solh₂idʰos, suffixed form of root *solh₂- (“integrate, whole”).
solidus m (feminine solida, neuter solidum); first/second declension
solidus m (genitive solidī); second declension
- (historical) A solidus: a Roman ~23k gold coin introduced by Diocletian in AD 301.
- (Medieval, historical) A bezant: the solidus's debased Byzantine successors.
- (Medieval, historical) A shilling, as a unit of account or silver coin.
- c. 1300, Tractatus de Ponderibus et Mensuris
- Libra continet viginti solidos
- The [London] pound contains twenty shillings.
- “solidus” in Charlton T. Lewis & Charles Short, A Latin Dictionary, Oxford: Clarendon Press, 1879.
- solid in The Century Dictionary, The Century Co., New York, 1911